Assertion : The two Fe atoms in `Fe_3O_4`, have different oxidation numbers.
Reason : `Fe^(2+)` ions decolourise `KMnO_4` solution.

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
C. If (A) is correct, but (R) is incorrect.
D. If both (A) and (R) are incorrect.

Answer

B

Explanation

`Fe_3O_4-= (overset(+2)(FeO).overset(+3)(Fe_2O_3))`
The oxidation states of Fe in `Fe_2O_3` are +2 and + 3.
`Fe^(2+) + underset("(Pink)")(MnO_(4)^(Theta)) to underset("(Colourless)")(Fe^(3+) + Mn^(2+))`